uuid: hoist uuid_is_null() helper from libnvdimm
authorChristoph Hellwig <hch@lst.de>
Thu, 11 May 2017 07:01:42 +0000 (09:01 +0200)
committerChristoph Hellwig <hch@lst.de>
Mon, 5 Jun 2017 14:59:05 +0000 (16:59 +0200)
commitef40dda5bbc310f6517082c0ff002913104358cd
treeac178c2745191dd43bcd32daa1de3b5616e39bf2
parentdf33767d9fe0ca93c606cc9042df05e5045c8158
uuid: hoist uuid_is_null() helper from libnvdimm

Hoist the libnvdimm helper as an inline helper to linux/uuid.h
using an auxiliary const variable uuid_null in lib/uuid.c.

[hch: also add the guid variant.  Both do the same but I'd like
to keep casts to a minimum]

The common helper uses the new abstract type uuid_t * instead of
u8 *.

Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
[hch: added guid_is_null]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
drivers/nvdimm/btt_devs.c
include/linux/uuid.h
lib/uuid.c